html - 以浮动外框为中心定位模态

Question

我有一个 bootstrap 4 模态，我希望显示一些不同。我想在模态左侧显示一个浮动框。

我的问题是如何将模态框和浮动框都定位在页面的中心，即使浮动框位于模态框的绝对位置之外？

这是目前的样子，浮动框的绝对位置具有负左位置：

这就是我希望它看起来的样子，盒子和模态居中：

我不知道我必须修改多少模式才能做到这一点，因为我希望它也能响应。

有人对我如何实现这一目标有任何想法吗？将不胜感激。

多谢你们。

.affix-box {
  position: absolute;
  top: -40px;
  left: -100px;
  width: 200px;
  height: 100px;
  background-color: green;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<div class="container">
  <div class="row">
    <div class="col-lg-12">
      <!-- Button trigger modal -->
      <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
  Launch demo modal
</button>

      <!-- Modal -->
      <div class="modal" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog modal-dialog-centered modal-xl" role="document">
          <div class="modal-content">
            <div class="affix-box"></div>
            <div class="modal-header">
              <h5 class="modal-title ml-auto" id="exampleModalLabel">Modal title</h5>
              <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
            </div>
            <div class="modal-body">
              ...
            </div>
            <div class="modal-footer">
              <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
              <button type="button" class="btn btn-primary">Save changes</button>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

标签： htmlcsstwitter-bootstrapbootstrap-modal

Answer 1

添加width: 91%;和left: 9%;到modal-content

.affix-box {
  position: absolute;
  top: -40px;
  left: -100px;
  width: 200px;
  height: 100px;
  background-color: green;
}
.modal-content{
width: 91%;
left: 9%;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<div class="container">
  <div class="row">
    <div class="col-lg-12">
      <!-- Button trigger modal -->
      <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
  Launch demo modal
</button>

      <!-- Modal -->
      <div class="modal" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog modal-dialog-centered modal-xl" role="document">
          <div class="modal-content">
            <div class="affix-box"></div>
            <div class="modal-header">
              <h5 class="modal-title ml-auto" id="exampleModalLabel">Modal title</h5>
              <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
            </div>
            <div class="modal-body">
              ...
            </div>
            <div class="modal-footer">
              <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
              <button type="button" class="btn btn-primary">Save changes</button>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>